| // Copyright (c) 2012 The Chromium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style license that can be |
| // found in the LICENSE file. |
| |
| #include "ash/launcher/launcher_button.h" |
| |
| #include <algorithm> |
| |
| #include "ash/launcher/launcher_button_host.h" |
| #include "grit/ash_resources.h" |
| #include "skia/ext/image_operations.h" |
| #include "ui/base/accessibility/accessible_view_state.h" |
| #include "ui/base/animation/animation_delegate.h" |
| #include "ui/base/animation/throb_animation.h" |
| #include "ui/base/events/event_constants.h" |
| #include "ui/base/resource/resource_bundle.h" |
| #include "ui/compositor/layer.h" |
| #include "ui/compositor/scoped_layer_animation_settings.h" |
| #include "ui/gfx/canvas.h" |
| #include "ui/gfx/image/image.h" |
| #include "ui/gfx/image/image_skia_operations.h" |
| #include "ui/views/controls/image_view.h" |
| |
| namespace { |
| |
| // Size of the bar. This is along the opposite axis of the shelf. For example, |
| // if the shelf is aligned horizontally then this is the height of the bar. |
| const int kBarSize = 3; |
| const int kBarSpacing = 5; |
| const int kIconSize = 32; |
| const int kHopSpacing = 2; |
| const int kIconPad = 8; |
| const int kHopUpMS = 0; |
| const int kHopDownMS = 200; |
| const int kAttentionThrobDurationMS = 1000; |
| |
| bool ShouldHop(int state) { |
| return state & ash::internal::LauncherButton::STATE_HOVERED || |
| state & ash::internal::LauncherButton::STATE_ACTIVE || |
| state & ash::internal::LauncherButton::STATE_FOCUSED; |
| } |
| |
| } // namespace |
| |
| namespace ash { |
| |
| namespace internal { |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // LauncherButton::BarView |
| |
| class LauncherButton::BarView : public views::ImageView, |
| public ui::AnimationDelegate { |
| public: |
| BarView() : ALLOW_THIS_IN_INITIALIZER_LIST(animation_(this)) { |
| animation_.SetThrobDuration(kAttentionThrobDurationMS); |
| animation_.SetTweenType(ui::Tween::SMOOTH_IN_OUT); |
| } |
| |
| // View overrides. |
| bool HitTestRect(const gfx::Rect& rect) const OVERRIDE { |
| // Allow Mouse...() messages to go to the parent view. |
| return false; |
| } |
| |
| void OnPaint(gfx::Canvas* canvas) OVERRIDE { |
| if (animation_.is_animating()) { |
| int alpha = animation_.CurrentValueBetween(0, 255); |
| canvas->SaveLayerAlpha(alpha); |
| views::ImageView::OnPaint(canvas); |
| canvas->Restore(); |
| } else { |
| views::ImageView::OnPaint(canvas); |
| } |
| } |
| |
| // ui::AnimationDelegate overrides. |
| void AnimationProgressed(const ui::Animation* animation) OVERRIDE { |
| SchedulePaint(); |
| } |
| |
| void ShowAttention(bool show) { |
| if (show) { |
| // It's less disruptive if we don't start the pulsing at 0. |
| animation_.Reset(0.375); |
| animation_.StartThrobbing(-1); |
| } else { |
| animation_.Reset(0.0); |
| } |
| } |
| |
| private: |
| ui::ThrobAnimation animation_; |
| |
| DISALLOW_COPY_AND_ASSIGN(BarView); |
| }; |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // LauncherButton::IconView |
| |
| LauncherButton::IconView::IconView() : icon_size_(kIconSize) { |
| } |
| |
| LauncherButton::IconView::~IconView() { |
| } |
| |
| bool LauncherButton::IconView::HitTestRect(const gfx::Rect& rect) const { |
| // Return false so that LauncherButton gets all the mouse events. |
| return false; |
| } |
| |
| //////////////////////////////////////////////////////////////////////////////// |
| // LauncherButton |
| |
| LauncherButton* LauncherButton::Create(views::ButtonListener* listener, |
| LauncherButtonHost* host) { |
| LauncherButton* button = new LauncherButton(listener, host); |
| button->Init(); |
| return button; |
| } |
| |
| LauncherButton::LauncherButton(views::ButtonListener* listener, |
| LauncherButtonHost* host) |
| : CustomButton(listener), |
| host_(host), |
| icon_view_(NULL), |
| bar_(new BarView), |
| state_(STATE_NORMAL) { |
| set_accessibility_focusable(true); |
| |
| const gfx::ShadowValue kShadows[] = { |
| gfx::ShadowValue(gfx::Point(0, 2), 0, SkColorSetARGB(0x1A, 0, 0, 0)), |
| gfx::ShadowValue(gfx::Point(0, 3), 1, SkColorSetARGB(0x1A, 0, 0, 0)), |
| gfx::ShadowValue(gfx::Point(0, 0), 1, SkColorSetARGB(0x54, 0, 0, 0)), |
| }; |
| icon_shadows_.assign(kShadows, kShadows + arraysize(kShadows)); |
| |
| AddChildView(bar_); |
| } |
| |
| LauncherButton::~LauncherButton() { |
| } |
| |
| void LauncherButton::SetShadowedImage(const gfx::ImageSkia& image) { |
| icon_view_->SetImage(gfx::ImageSkiaOperations::CreateImageWithDropShadow( |
| image, icon_shadows_)); |
| } |
| |
| void LauncherButton::SetImage(const gfx::ImageSkia& image) { |
| if (image.isNull()) { |
| // TODO: need an empty image. |
| icon_view_->SetImage(image); |
| return; |
| } |
| |
| if (icon_view_->icon_size() == 0) { |
| SetShadowedImage(image); |
| return; |
| } |
| |
| // Resize the image maintaining our aspect ratio. |
| int pref = icon_view_->icon_size(); |
| float aspect_ratio = |
| static_cast<float>(image.width()) / static_cast<float>(image.height()); |
| int height = pref; |
| int width = static_cast<int>(aspect_ratio * height); |
| if (width > pref) { |
| width = pref; |
| height = static_cast<int>(width / aspect_ratio); |
| } |
| |
| if (width == image.width() && height == image.height()) { |
| SetShadowedImage(image); |
| return; |
| } |
| |
| SetShadowedImage(gfx::ImageSkiaOperations::CreateResizedImage(image, |
| skia::ImageOperations::RESIZE_BEST, gfx::Size(width, height))); |
| } |
| |
| void LauncherButton::AddState(State state) { |
| if (!(state_ & state)) { |
| if (ShouldHop(state) || !ShouldHop(state_)) { |
| ui::ScopedLayerAnimationSettings scoped_setter( |
| icon_view_->layer()->GetAnimator()); |
| scoped_setter.SetTransitionDuration( |
| base::TimeDelta::FromMilliseconds(kHopUpMS)); |
| state_ |= state; |
| UpdateState(); |
| } else { |
| state_ |= state; |
| UpdateState(); |
| } |
| if (state & STATE_ATTENTION) |
| bar_->ShowAttention(true); |
| } |
| } |
| |
| void LauncherButton::ClearState(State state) { |
| if (state_ & state) { |
| if (!ShouldHop(state) || ShouldHop(state_)) { |
| ui::ScopedLayerAnimationSettings scoped_setter( |
| icon_view_->layer()->GetAnimator()); |
| scoped_setter.SetTweenType(ui::Tween::LINEAR); |
| scoped_setter.SetTransitionDuration( |
| base::TimeDelta::FromMilliseconds(kHopDownMS)); |
| state_ &= ~state; |
| UpdateState(); |
| } else { |
| state_ &= ~state; |
| UpdateState(); |
| } |
| if (state & STATE_ATTENTION) |
| bar_->ShowAttention(false); |
| } |
| } |
| |
| gfx::Rect LauncherButton::GetIconBounds() const { |
| return icon_view_->bounds(); |
| } |
| |
| bool LauncherButton::OnMousePressed(const ui::MouseEvent& event) { |
| CustomButton::OnMousePressed(event); |
| host_->PointerPressedOnButton(this, LauncherButtonHost::MOUSE, event); |
| return true; |
| } |
| |
| void LauncherButton::OnMouseReleased(const ui::MouseEvent& event) { |
| CustomButton::OnMouseReleased(event); |
| host_->PointerReleasedOnButton(this, LauncherButtonHost::MOUSE, false); |
| } |
| |
| void LauncherButton::OnMouseCaptureLost() { |
| ClearState(STATE_HOVERED); |
| host_->PointerReleasedOnButton(this, LauncherButtonHost::MOUSE, true); |
| CustomButton::OnMouseCaptureLost(); |
| } |
| |
| bool LauncherButton::OnMouseDragged(const ui::MouseEvent& event) { |
| CustomButton::OnMouseDragged(event); |
| host_->PointerDraggedOnButton(this, LauncherButtonHost::MOUSE, event); |
| return true; |
| } |
| |
| void LauncherButton::OnMouseMoved(const ui::MouseEvent& event) { |
| CustomButton::OnMouseMoved(event); |
| host_->MouseMovedOverButton(this); |
| } |
| |
| void LauncherButton::OnMouseEntered(const ui::MouseEvent& event) { |
| AddState(STATE_HOVERED); |
| CustomButton::OnMouseEntered(event); |
| host_->MouseEnteredButton(this); |
| } |
| |
| void LauncherButton::OnMouseExited(const ui::MouseEvent& event) { |
| ClearState(STATE_HOVERED); |
| CustomButton::OnMouseExited(event); |
| host_->MouseExitedButton(this); |
| } |
| |
| ui::EventResult LauncherButton::OnGestureEvent( |
| const ui::GestureEvent& event) { |
| switch (event.type()) { |
| case ui::ET_GESTURE_TAP_DOWN: |
| AddState(STATE_HOVERED); |
| return CustomButton::OnGestureEvent(event); |
| case ui::ET_GESTURE_END: |
| ClearState(STATE_HOVERED); |
| return CustomButton::OnGestureEvent(event); |
| case ui::ET_GESTURE_SCROLL_BEGIN: |
| host_->PointerPressedOnButton(this, LauncherButtonHost::TOUCH, event); |
| return ui::ER_CONSUMED; |
| case ui::ET_GESTURE_SCROLL_UPDATE: |
| host_->PointerDraggedOnButton(this, LauncherButtonHost::TOUCH, event); |
| return ui::ER_CONSUMED; |
| case ui::ET_GESTURE_SCROLL_END: |
| host_->PointerReleasedOnButton(this, LauncherButtonHost::TOUCH, false); |
| return ui::ER_CONSUMED; |
| default: |
| return CustomButton::OnGestureEvent(event); |
| } |
| } |
| |
| void LauncherButton::GetAccessibleState(ui::AccessibleViewState* state) { |
| state->role = ui::AccessibilityTypes::ROLE_PUSHBUTTON; |
| state->name = host_->GetAccessibleName(this); |
| } |
| |
| void LauncherButton::Layout() { |
| const gfx::Rect button_bounds(GetContentsBounds()); |
| int x_offset = 0, y_offset = 0; |
| gfx::Rect icon_bounds; |
| |
| if (host_->GetShelfAlignment() == SHELF_ALIGNMENT_BOTTOM) { |
| icon_bounds.SetRect( |
| button_bounds.x(), button_bounds.y() + kIconPad, |
| button_bounds.width(), kIconSize); |
| if (ShouldHop(state_)) |
| y_offset -= kHopSpacing; |
| } else { |
| icon_bounds.SetRect( |
| button_bounds.x() + kIconPad, button_bounds.y(), |
| kIconSize, button_bounds.height()); |
| if (!ShouldHop(state_)) |
| x_offset += kHopSpacing; |
| } |
| |
| if (host_->GetShelfAlignment() == SHELF_ALIGNMENT_LEFT) |
| x_offset = -x_offset; |
| icon_bounds.Offset(x_offset, y_offset); |
| icon_view_->SetBoundsRect(icon_bounds); |
| bar_->SetBoundsRect(GetContentsBounds()); |
| } |
| |
| void LauncherButton::ChildPreferredSizeChanged(views::View* child) { |
| Layout(); |
| } |
| |
| void LauncherButton::OnFocus() { |
| AddState(STATE_FOCUSED); |
| CustomButton::OnFocus(); |
| } |
| |
| void LauncherButton::OnBlur() { |
| ClearState(STATE_FOCUSED); |
| CustomButton::OnBlur(); |
| } |
| |
| void LauncherButton::Init() { |
| icon_view_ = CreateIconView(); |
| |
| // TODO: refactor the layers so each button doesn't require 2. |
| icon_view_->SetPaintToLayer(true); |
| icon_view_->SetFillsBoundsOpaquely(false); |
| icon_view_->SetHorizontalAlignment(views::ImageView::CENTER); |
| icon_view_->SetVerticalAlignment(views::ImageView::LEADING); |
| |
| AddChildView(icon_view_); |
| } |
| |
| LauncherButton::IconView* LauncherButton::CreateIconView() { |
| return new IconView; |
| } |
| |
| bool LauncherButton::IsShelfHorizontal() const { |
| return host_->GetShelfAlignment() == SHELF_ALIGNMENT_BOTTOM; |
| } |
| |
| void LauncherButton::UpdateState() { |
| if (state_ == STATE_NORMAL) { |
| bar_->SetVisible(false); |
| } else { |
| int bar_id; |
| if (IsShelfHorizontal()) { |
| if (state_ & (STATE_HOVERED | STATE_FOCUSED | STATE_ATTENTION)) |
| bar_id = IDR_AURA_LAUNCHER_UNDERLINE_HOVER; |
| else if (state_ & STATE_ACTIVE) |
| bar_id = IDR_AURA_LAUNCHER_UNDERLINE_ACTIVE; |
| else |
| bar_id = IDR_AURA_LAUNCHER_UNDERLINE_RUNNING; |
| } else { |
| if (state_ & (STATE_HOVERED | STATE_FOCUSED | STATE_ATTENTION)) |
| bar_id = IDR_AURA_LAUNCHER_UNDERLINE_VERTICAL_HOVER; |
| else if (state_ & STATE_ACTIVE) |
| bar_id = IDR_AURA_LAUNCHER_UNDERLINE_VERTICAL_ACTIVE; |
| else |
| bar_id = IDR_AURA_LAUNCHER_UNDERLINE_VERTICAL_RUNNING; |
| } |
| |
| ResourceBundle& rb = ResourceBundle::GetSharedInstance(); |
| bar_->SetImage(rb.GetImageNamed(bar_id).ToImageSkia()); |
| bar_->SetVisible(true); |
| } |
| |
| switch (host_->GetShelfAlignment()) { |
| case SHELF_ALIGNMENT_BOTTOM: |
| bar_->SetHorizontalAlignment(views::ImageView::CENTER); |
| bar_->SetVerticalAlignment(views::ImageView::TRAILING); |
| break; |
| case SHELF_ALIGNMENT_LEFT: |
| bar_->SetHorizontalAlignment( |
| base::i18n::IsRTL() ? views::ImageView::TRAILING : |
| views::ImageView::LEADING); |
| bar_->SetVerticalAlignment(views::ImageView::CENTER); |
| break; |
| case SHELF_ALIGNMENT_RIGHT: |
| bar_->SetHorizontalAlignment( |
| base::i18n::IsRTL() ? views::ImageView::LEADING : |
| views::ImageView::TRAILING); |
| bar_->SetVerticalAlignment(views::ImageView::CENTER); |
| break; |
| } |
| |
| Layout(); |
| SchedulePaint(); |
| } |
| |
| } // namespace internal |
| } // namespace ash |